Patent GB-191322059-A (GB)
Title: An Improved Automatic Filling, Weighing and Measuring Machine.
Inventor: LAMB JAMES GODDARD
IPC: G01G13/00
Filed: 1913-09-30
Granted: 1914-12-24
Abstract: 22,059. Lamb, J. G. Oct. 1, 1912, [Convention date]. Automatic-feed weighers.-Relates to automatic apparatus for weighing granular material, liquids, &c. into bags or other receptacles, and comprises essentially the combination of rotating feeding-sleeves encircled by sliding collars which are connected by chains to pivoted trays, so that when the pivoted trays automatically swing beneath the mouths of the feeding-sleeves, the sliding collars descend on to the bottoms of the trays and prevent the escape of the material being fed. The weighing-scales are carried on a platform 12, Fig. 1, which has a rounded base 8 and is levelled upon a stand 2 by means of screws 6. Spirit levels are inset in the platform 12. The material descends from a hopper 18 through two parallel sleeves 76, Fig. 6, which are rotated by means of a treadle 118. At the lower ends of the sleeves 76 are pivoted on knife-edges 132, Fig. 5, a pair of trays 128, which are held in the open position shown by means of pawls 162. On the descent of the receptacle, which is carried by a vertically-adjustable platform 58, an adjustable projection on one of the supporting- rods 50 of the platform engages and releases, one after the other, the pawls 162, and allows the trays 128 to swing beneath the rotating sleeves 76, the action being assisted by projections on the rod 50 drawing down a pair of rollers 158. At the same time, sliding collars, encircling the lower ends of the sleeves 76 and supported on the ends of pivoted starting-levers, are caused by flexible connexions with the trays 128 to descend towards the bases of the trays, thus preventing the further feed of material. After replacement of the filled receptacle by an empty one, the operation is restarted by depressing the starting-levers and thereby raising the encircling sleeves and swinging back the trays 128 into engagement with the pawls 162. Agitators 92 are secured to the rotating sleeves 76, and teeth on the sleeves vibrate additional agitators 96 secured within the hopper 18. Varying specific gravity of the materials weighed is compensated for by a poise on the scale-beam. The Specification as open to inspection under Section 91 (3) (a) comprises also a modification wherein the machine is power-driven and the series of operations is repeated automatically. The platform 58 is replaced by a double-ended rotating receptacle the bases of which are adjustable to vary the capacities. The receptacle is prevented from rotating by a catch which is released by a stop on the frame, thus causing the discharge of the weighed material down a shoot into a bag. The pawls 162 are dispensed with, and the adjustable projection on the supporting - rod 50 is provided with pins which engage rollers on the trays 128 and thus effect the cut-off of the feed. In a modified device for compensating for varying specific gravity, a roller on the end of the scale - beam bears against a pivoted arm, the influence of which may be varied by means of an adjustable nut co-operating with a graduated scale. One of the cut-off trays may be replaced 'by a tray carried by an upward extension of the abovementioned pivoted arm. This subject - matter does not appear in the Specification as accepted.